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35 lines
1.2 KiB
JavaScript
35 lines
1.2 KiB
JavaScript
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import inspect from "../../jsutils/inspect.mjs";
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import { GraphQLError } from "../../error/GraphQLError.mjs";
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import { getNamedType, isLeafType } from "../../type/definition.mjs";
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/**
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* Scalar leafs
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*
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* A GraphQL document is valid only if all leaf fields (fields without
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* sub selections) are of scalar or enum types.
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*/
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export function ScalarLeafsRule(context) {
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return {
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Field: function Field(node) {
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var type = context.getType();
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var selectionSet = node.selectionSet;
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if (type) {
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if (isLeafType(getNamedType(type))) {
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if (selectionSet) {
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var fieldName = node.name.value;
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var typeStr = inspect(type);
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context.reportError(new GraphQLError("Field \"".concat(fieldName, "\" must not have a selection since type \"").concat(typeStr, "\" has no subfields."), selectionSet));
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}
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} else if (!selectionSet) {
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var _fieldName = node.name.value;
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var _typeStr = inspect(type);
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context.reportError(new GraphQLError("Field \"".concat(_fieldName, "\" of type \"").concat(_typeStr, "\" must have a selection of subfields. Did you mean \"").concat(_fieldName, " { ... }\"?"), node));
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}
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}
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}
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};
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}
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